working paper Archives - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

September 21, 2019

Detecting and Geolocating Jammers and Spoofers Using Integrated AOA and TDOA Measurements

by Joon Wayn Cheong, Andrew G. Dempster, Joe Fleming, Ming Zhu & Graeme Hooper

Due to the proliferation of personal privacy devices and other jamming sources, it is imperative for safety-critical GNSS users such as airports and marine ports to be situationally aware of local GNSS interference. This article proposes and validates an enhanced method for geolocating GNSS interference sources so that jammers and spoofers can be found and disabled.

By Inside GNSS

December 5, 2018

Measuring Galileo Performance: Navigation and Timing Performance Figures of Merit | Part 2

This article provides an overview of the current Galileo system deployment status and performance trends since the Initial Open Service declaration on December 15, 2016. The system performance is assessed through a set of navigation and timing performance figures of merit. The outstanding performance results along with the acceleration in the constellation and ground segment deployment confirm that the Galileo system is on track towards Full Operational Capability. That Initial Open Service Declaration in late 2016 marked a historical milestone in the Galileo program. Here the authors will illustrate that Galileo has arrived and that it works.

By Inside GNSS

Air Trafic Control tower and airplance at Paris Airport

September 25, 2018

GNSS Spoofing and Aviation: An Evolving Relationship

One of the great engineering successes of the International Civil Aviation Organization (ICAO) and its expert panels is the standardization of globally harmonized Communication, Navigation and Surveillance (CNS) systems. These standards, sometimes supported by more detailed industry standards, provide safe and interoperable services between aircraft and the ground and space systems supporting them.

By Gerhard (Gary) Berz

April 4, 2018

GNSS Analysis Tools from Google

Authors: Frank van Diggelen and Mohammed Khider
Google has publicly released GNSS Analysis Tools to process and analyze GNSS raw measurements from your phone. These tools enable manufacturers to see in detail how well the GNSS receivers are working in each particular phone design and thus improve the GNSS design and performance in their phones. Also, with the tools publicly available there is significant value for app-developers, researchers and educators. Here, the authors show what these tools do, and how they reveal details of receiver and signal behavior that are not possible to observe without raw measurements.

By Inside GNSS

November 27, 2017

Do modern multi-frequency civil receivers eliminate the ionospheric effect?

Figures 1 – 10

Q: Do modern multi-frequency civil receivers eliminate the ionospheric effect?

By Mark Petovello